Reporting tool



C. D. HELL RTING TOOL Filed June 9,1924 2 Sheets-Sheet 2 INVENTQR, HEM m7? Patented July 30, 1929.

UNl'lE i cnnnrnnrn. HELLYEB, on LOS n'nennns, ontironnle.

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Application filed June 9,

This invention relates to cutting machines. The general object of the invention is to provide a reporting tool which is adapted for operating on the valve seats of-internal combustion engines. 1 V v 'Another object of the invention is to provide a reporting tool includinga handle and cutting members wherein improved means is provided in the handlefor moving the cutting j members to cut holes of difierent sizes. i d Other objects of the invention will be apparent from the following description taken in connection with the accompanying drawings whereln Fig. 1 153.11 elevation oi an assemble'd reporting tool; Fig. 2 is a central secs tional view of the tool; Fig. 3 is an end elevation of the tool; Fig. 4 is a section on line 44, Fig. 2; F ig. 5 is a section showing the tool in elevation and wherein the tool is being insorted in position; Fig. 6 is a view similar to Fig. 5 showing the tool ready for the cutting- The body is provided with an enlargedhead as at 14 adjacentone end and at the other end is provided with a flat shoulder 15 for engagea? ment by an indicating member to be presently described. Intermediate the ends or the body portion I provide a rectangular portion 16 which may be engaged by a wrench for turning the tool.

The body portion is shown as provided with opposed apertures 17 which are adapted to be engaged by the threaded extremities of handles 18. The enlarged head lt of the tool is shown as provided with opposed slots 20. Each of the slots 20 is defined by parallelsidewalls as shown. Mounted to slide in the slots 20 I show a pair of cutting knives 21. These knives are adapted to have a tight sliding fit within the slot 20 and on their opposed faces are shown as provided with racks 22, for a purpose to be later described. The cutting knives 21 carried by the head 14 are provided with sharpened portions at both ends so that by turning the knives over and turning them end for end both extremities may be used for cutting.

1924. Serial No. 718,754.

The head 14c is shown as provided witha cap25 which is'in thenature of a closure cap. The cap 25 is shown as provided with a depending skirt 26, which may be slotted as at v 27'to receive the protruding portion of the j knives 21. The-skirt 26-and the cap 25 s'erve' to 'holdthe cutting knives firmly in position. The cap 25 maybe secured-in place by suitable screws 2"; or in anyother desired vmanner;

My reporting tool is particularly adapted for operating on valve seats of internalcombustion engines. These valve seats frequently are arranged in a cavity, the opening to which p v is smaller than the diameter of the valve seat. As a consequence, it isimpossible to insert the usual cutters within the cavity since any cut+ ter which is large enough to make the desired cut is too large to pass through theopening to the cavity. p v 7 In-order to provide means to center-the tool,

I provide a pilot or guide 28 which is shown asremovably secured to the cap 25. By prov ding a set of pilots 28 with each tool; the operator will have the correct pilot to litany valve stem aperture.

In order to hold the knives 21 in position and to adjust them laterally for making the correct out, I show the body 10 as provided with a central operating'member 30. i This operating member v3O is shown as provided with a pinion 31 adjacent its lower end. This pinion 31 as shown in Fig. 7 engages the opposed racks 22 on the knives 21. 'The oper-, ating member 30 is provided with a head-33 thereon which maybe secured to the operatm'ember by a suitable pin 32. The end or" the operating member 30 opposite the pinion 31 is provided with a reduced portion 34 which is adapted to receive an adjusting knob 36 as shown. The adjusting knob 36 may be a cap member which may be threaded on the portion 34. To prevent turning of the adjusting knob, I show a set screw 37 which is adapted to fit against a flattened portion near the end of the operating mem ber 30. In order to cut a number of valve seats of thesame size it is desirable that indicating means he provided to quickly and readily inv dicate the relative adjustment of the cutting knives 21. To do this, I provide a gaugering or indicator, lO. This is secured for-longitudinal movement on the operating member 30. The gauge ring 40 is provided with a key 41 which engages in a keyway 42 in the oper- Ill) ating member 30 so that the, dial Will slide longitudinally on the operating member 30 but Will be prevented from rotary movement thereon. The ring 40 is provided With ascale 4L1 thereon While the body portion ispr'ovided with a zero mark 42'thereon. In order to hold the gauge ring M) in adjusted position which is adapted to engage the adjacent port-ion of the gauge ring 40. The upper and lower surfaces of the ring are plane so that it W ll be apparent that When the lock nut is ro- Jtated in the proper direction,'the gauge ring AtO will slide along itskeyway and will tightly engage the shoulder on the body 10 to thus firmly lock the cuttingknives in position.

In operating the device to out a valve seat,

the lock nut is'released and theknob 36 is vturned so that the knives are moved inwardly. The reporting tool is then inserted throughthe aperture and is brought adj acentthevalve seat. After this is done they adjusting knob 36 is rotated in the proper direction until the, correct reading on the scale 41 appears. This being done the lock nut 45 is tightened to se- 7 cure the knives in position. After this is done the Workman grasps the handles 18 and performs the necessary cutting operation. If desired, the device may be turned by a Wrench which engages the rectangular portion16, in-

V stead of turning the handles 18.

After the cut is made, the lock nut is released and the adjusting knob operated to re 'duce the diameter of the tool so that it can 7, be removed a-nd will be ready for another operation.

.Having' thus described" my invention,

claim ,1.-In a cutting tool, a handle, an enlarged head on said handle, a cap reinovably'secured to said head, said cap having a skirt thereon surrounding said head, an enlarged recess in said cap, a pilot removably secured on said cap, a hole extending through said handle, a pair of transverse slots in said head and aligning slots in said skirt of said cap, a cutting knife in each OfStLlCl slots, said cutting knlves each having a rack on one face thereof,'an 7 operating rod, said operating rod being p0- sitioned 1n said hole and having at one end a pinion adaptedto engage said racks on, said knives, an enlarged head on said rod pos1-- tioned in said recess of said cap, said rod head" a being adapted to engage theunder face of each of said knivest'o hold said knives in adjusted position against the head of-said han die, a ring keyed to slide along one end of said rod, a threaded lock nut on said rod above said ring, said lock nut adapted to force said rlng againstsaid handle to holdsaid'k'nives' in adjusted position and an enlarged knob on said rod above said nut for turning said rod to move said knives.

2. In a cuttin tool a handle havin a hole 7 extending therethrough, said handle having an enlargement at one end thereof, a-pair of transverse slots in said enlargement, a cutting knife in each slot, an operating rod extending through said handle, an enlarged head on said rod adapted to engage the under side of said knives, said rod havingmeans thereon adapted to move said knives, a ring keyed to'slide along one end of'the rod, a threaded lock nut on said rod, saidlock nut being adapted to force saidring against said handle to hold said knives in ad usted position and clamp saidknives between said rod head and said enlargement, an operating knob on said rod, said enlarged portion having a cap fitted thereover, and a pilot secured on said cap.

In testlmony whereof, I hereunto aiiix my signature.

I CLEMENT '1). HELLYER. 

